ATMEGA169V-1MC Atmel, ATMEGA169V-1MC Datasheet - Page 210
ATMEGA169V-1MC
Manufacturer Part Number
ATMEGA169V-1MC
Description
IC MCU AVR 16K 1.8V 1MHZ 64-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA169V-1MC
Core Processor
AVR
Core Size
8-Bit
Speed
1MHz
Connectivity
SPI, UART/USART, USI
Peripherals
Brown-out Detect/Reset, LCD, POR, PWM, WDT
Number Of I /o
53
Program Memory Size
16KB (8K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
64-MLF®, 64-QFN
For Use With
ATAVRISP2 - PROGRAMMER AVR IN SYSTEMATAVRBFLY - KIT EVALUATION AVR BUTTERFLYATSTK502 - MOD EXPANSION AVR STARTER 500
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
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LCD Controller
Features
Overview
Definitions
210
ATmega169V/L
The LCD Controller/driver is intended for monochrome passive liquid crystal display
(LCD) with up to four common terminals and up to 25 segment terminals.
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A simplified block diagram of the LCD Controller/Driver is shown in Figure 96. For the
actual placement of I/O pins, refer to “Pinout ATmega169” on page 2.
An LCD consists of several segments (pixels or complete symbols) which can be visible
or non visible. A segment has two electrodes with liquid crystal between them. When a
voltage above a threshold voltage is applied across the liquid crystal, the segment
becomes visible.
The voltage must alternate to avoid an electrophoresis effect in the liquid crystal, which
degrades the display. Hence the waveform across a segment must not have a DC-
component.
Several terms are used when describing LCD. The definitions in Table 1 are used
throughout this document.
Table 93. Definitions
LCD
Segment
Common
Duty
Bias
Frame Rate
Display Capacity of 25 Segment and Four Common Terminals
Latching of Display Data gives Full Freedom in Register Update
Support Static, 1/2, 1/3 and 1/4 Duty
Support Static, 1/2, 1/3 Bias
Display Possible in Power-save Mode for Low Power Consumption
Low Power Waveform Software Selectable
Flexible Selection of Frame Frequency
Software Selection between System Clock or an External Asynchronous Clock Source
On-chip LCD Power Supply, only One External Capacitor needed
LCD Output Voltage (Contrast) Software Selectable from 2.6 to 3.35V for V
Operating Range
Equal Source and Sink Capability to Increase LCD Life Time
LCD Interrupt Can be Used for Display Data Update or Wake-up from Sleep Mode
Segment and Common Pins not Needed for Driving the Display Can be Used as Ordinary
I/O Pins
A passive display panel with terminals leading directly to a segment
The least viewing element (pixel) which can be on or off
Denotes how many segments are connected to a segment terminal
1/(Number of common terminals on a actual LCD display)
1/(Number of voltage levels used driving a LCD display -1)
Number of times the LCD segments is energized per second.
CC
2514H–AVR–05/03
in the Entire
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